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Piston and Rod Seals
Spring-energized Seal Details

Spring-energized seals are single-acting sealing elements primarily used for sealing reciprocating pistons and rods as well as being suitable for use in rotary, swiveling and static applications. The seal comprises two components:
  • an outer sealing element made of high-strength plastic (e.g. PTFE, PE-UHMW)
  • an integral stainless steel spring.

To cover an optimum range of pressures and temperatures, two basic versions have been developed, differing in terms of outer geometry, but especially in terms of spring design and characteristic curves of the springs.
The U- and C-type designations are based on the respective shape of the seal.

Benefits
Outstanding chemical resistance against aggressive media
suitable for high-temperature applications of –95°C to +300°C.
also suitable for use under low-lube and/or dry operating conditions
suitable for use with non-hardened cylinders and rods
high wear-resistance of the seal lip compound
low friction; variable friction conditions through choice of spring characteristics
no stick-slip even at low speeds
low break-away forces even after extended down times
high dimensional stability
compact seal design, suitable for 0-ring installation grooves acc. to ARP 568 A, DIN 3771 and ISO 3601/1
favorable cost/benefit ratio






Innovations in plastics – for over 40 years we have been one of the technology leaders for seals and engineering design elements. For our customers around the world we develop and produce solutions that stand the test of practical application: from PTFE and PTFE-compounds, thermoset and other high-performance plastics as well as PTFE-composite components including plastics or metals. As single, custom solutions, up to dimensions of 3,000 mm, or from an extensive portfolio of standard series. Our products can be found in virtually any industry as well as in medical technology. Our merger with Venus and the integration of the Venus product portfolio now puts us in a position to offer you PTFE processing capabilities that rank among the most extensive in the world. Benefit from our expanded capacities to deliver complete solutions from the semi-finished product through to the functional solution custom-tailored to your needs. Your previous points of contact are ready to serve you with additional options and greater flexibility. Together, we’ll make the best of plastics for you. PTFE plays a key role in this – a compound with unique properties for engineering applications, even under extreme conditions.